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Патент USA US3081066

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March 12, 1963
3,081,055
R. M. FULLER
COLLAPSIBLE STOOL
Filed July 21, 1961
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: l
2 Sheets-Sheet 1
I:
1
INVENTOR
ROY
M FULLER
WM
March 12, 1963
R. M. FULLER
3,081,055 .
COLLAPSIBLE STOOL
Filed July 21, 1961
2 Sheets-Sheet 2
v-C
J
-8
-
INVENTOR
ROY
BY
1w. FULLER.
{40w
ATTORNEY
United States} Patent 0 M102
3,081,055
7 Patented Mar. v12, 1963
2
1
3,081,055
COLLAPSIBLE STOOL
Roy M. Fuller, 525 W. 23rd St., San Pedro, Calif.
Filed July 21, 1961, Ser. No. 125,710
4 Claims. (Cl. 248—164)
This invention relates to collapsible supporting or seat
ing structures such as camp stools or beach chairs and is
spread out flat, with the two side frames connected only
by the fabric seating;
FIGURE 7 is a top plan view showing the legs of each
side frame individually collapsed along the respective
adjacent fabric edge, with the latter in the same position
as in FIGURE 6 but with the fabric-holding suspension
arms rotated 180° on their longitudinal axis for better
illustration;
particularly exempli?ed by a collapsible stool which can
FIGURE 8 is an end elevational view of the structure
adequately support an adult (either sitting or standing 10 of FIGURE 7 with the fabric seating folded upon itself
thereon) wherever quickly assembled within or without
along the vertical axis of FIGURE 7;
doors, and which can be momentarily collapsed to a
FIGURE 9 is an elevational view of the structure of
FIGURE 8 as viewed at right angles thereto in the direc
tion of the arrow 9; and
in one hand. Such structures are particularly adapted 15
FIGURE 10 is a perspective view of the structure of
for use at sporting events and other assemblies where seats
FIGURES 8-9 rolled into a compact bundle by wrapping
may not be provided and where full-size chairs obviously
the fabric around each end structure as the latter are
cannot be moved thru crowds by each individual even
axially rotated toward each other.
if available nearby. However the present collapsed bun
The here exempli?ed collapsible stool is formed of a
dle (requiring no unconnected elements in assembly) 20 pair of similar, inverted U-shaped, side frames 12, 14
can be carried about (either by hand or in a coat pocket)
(FIGURE 6) of slightly different lengths, having the
with less interference to members of a crowd than protwo cross arms of the U permanently transversely con
duced by an umbrella or walking stick. In addition it is
nected by a ?exible, generally rectangular surface of
light weight, easy to assemble and collapse without use
seating material 16 such as canvas, nylon, Saran, glass
of any tools, and can be readily and cheaply fabricated 25 ?ber or other synthetic plastic or natural ?ber. Con
of a variety of available materials, even of scrap elements
veniently the seat 16 is formed of a single sheet of mate
if desired or required.
rial but this does not preclude similar employment of
Accordingly it is an object of the invention to provide
strands or wider strips of like material woven or cross
an improved article of the character described. An im
laced with each other.
po-rtant feature is a construction which permits each of 30
In the present form, the frames are constructed typical
compact bundle only half the length and height of the
stool, which bundle can be readily grasped and carried
the four legs to be segmentally collapsed adjacent the
four corners of the seating surface, which latter can be
folded upon itself and then rolled into a bundle together
ly of wooden members, conveniently rectangular in sec
tion. However, they may also be made of other rigid
materials including metal and plastic, and other shapes
with the collapsed legs. A particular advantage arises
are not excluded for the elongated members including
from the employment of hingedly connected leg segments, 35 tubes and/or externally curved rods. Each frame 12,
readily braced in seat-supporting positionlongitudinally
14 has a pair of end-abutting, longitudinally aligned
aligned in end abutment with each other and with the cross
support or suspension arms 18, 20 to which the seating
material 16 is attached along its longitudinal edge, ex
tending lengthwise in each direction from a medial cut
in juxtaposition with the upper face of the cross support. 40 out or inset portion 22, 23 of the sheet. The adjacent,
Such arrangement utilizes particular spacing arrangements
abutting ends of the suspension arms are mutually at
as herein de?ned.
tached along their underface by a hinge 24 (FIGURES
Other objects and advantages will become apparent
4 and 8) so as to permit their outer ends 26, 28 to be
as the description proceeds, having particular reference
collapsed or folded down toward or against each other
to the accompanying drawings depicting a presently pre 45 (from the assembled or supporting position of FIGURE
ferred embodiment of the invention wherein
1), which hinge at the same time maintains each end
, FIGURE 1 is a perspective view of my collapsible stool
adjaccnt pair of suspension arms (18, 20) in a continu—
assembled in position for use;
ous, level, generally horizontally disposed plane, even
FIGURE 2 is a side elevational view of the inner face of 50 when supporting the weight of a person on the seat 16.
a parallel pair of legs of one side of the stool as seen
The outer end 26, 28 of each of the four suspension
along the line 2—2 of FIGURE 1, with a portion of the
arms 18, 19, 20, 21 also has a?ixed to its upper face
seating material removed from the upper suspension arm;
(or formed integral therewith) a short, upstanding, spac~
FIGURE 3 is an end elevational view of the inner face
ing block 30 of width and thickness generally correspond
of a crossed pair of legs at one end of the assembled 55 ing. to the dependent support arm. Also the underface
stool as viewed along the line 3~3 of FIGURE 2;
of each suspension arm has a short hook or latch mem
FIGURE 4 is an‘ elevational view particularly showing
ber 32 free swinging from an attachment eye 34 adjacent
support of the seating material, and in collapsed position
articulating outward to‘ be disposable in compact layers
the several hinge members and channel bracket adjacent
one corner of the frame as seen along the line 4—4 of
the outer end.
'
Each of the four legs 36, 37, 38, 39 is formed of three,
FIGURE 1;
60 hingedly connected segments a, b, c disposed end to end
FIGURE 5- is a perspective view of the cross bracing
by successive hinges 40, 42, 44 extensible in a straight
of an end pair of legs as seen from the inner face, the
line perpendicularly downward from the underface of
nearer leg being sectioned along the line 5-5 of FIG
the respective, horizontally disposed, suspension arm to
which the uppermost segment a is articulated adjacent its
URE 3;
FIGURE 6 is a top plan view of the entire structure
transverse edge. Accordingly, the shortest, proximate
3,081,055
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4
segment a is swingable on the hinge 40 thru an angle
of 180° between a support position with its end disposed
in frictional registration with the underface of the sus
pension arm (20, FIGURE 4), and a collapsed position
each connected side edge; each frame being formed with
a longitudinally aligned pair of suspension arms jointly
forming the cross arm of the U, which arms are termi
nally hinged together adjacent said inset portion by a
with its longitudinal face jointly against the vertical ends
dependent hinge so as to be movable between a support
of the horizontal members 20, 30. When folded or col
ing position of end abutment and a collapsed position
lapsed in the latter position, the next hinge 42 will then
permit the leg segment b to be disposed parallel to and
wherein both outer ends are downswung toward each
other with said seating material folded along a transverse
line connecting said insets; a latch member located ad
spaced above the suspension arm (18, 19, 20, 21, FIG
URE 7) in juxtaposition with the spacing member 30. 10 jacent each outer end of each suspension arm for angu
lar bracing of the adjacent leg by selective engagement
At the same time, the outermost hinge 44 permits the
therewith when in dependent position; each outer end
distal segment c to be swung 180° so as to be sandwiched
of each suspension arm being formed with a short, up
between the intermediate segment b and the upper face
standing rectangular projection upon its upper face hav
of the suspension arm, with the free end 45 of the seg
ment 0 disposed adjacent the inner end 46 of the spacing 15 ing a thickness equal to the thickness of said legs; each
of the four legs being formed by three successive,
member (FIGURE 8).
hingedly connected segments of unequal length and equal
It will be observed that the length of the intermediate
thickness to the thickness of the suspension arms and
segment b exceeds the length of the distal segment 0 at
consisting of (a) a proximate segment of length equal
least by the length of the spacing member 30‘; and the
length of the proximate segment a is just su?‘icient to 20 to the combined thickness of a suspension arm plus said
swing the segment 12 to a position frictionally overlying
upstanding projection thereon, whereby said segment can
be swung between a supporting position wherein one end
the horizontal block 30. In the present form, addition
of the dependent, upright disposed segment abuts against
ally, the thickness of each of the structural members be
the underface of the adjacent connected suspension
ing half the length of the spacing block 30, the length of
the latter is also equal to the length of the proximate
arm, and a collapsed position outswung 180° wherein its
longitudinal face is disposed against the adjacent ends
segment a. Thus the three piece leg folds or collapses
of the suspension arm and upstanding projection jointly,
against the suspension arm in two layers to form a com
(b) an intermediate segment adapted in collapsed posi
pact three-layer structure about which the collapsed seat
tion to overlie the adjacent connected suspension arm in
ing material 30 can be wound without removal of any
structural members as subsequently detailed.
30 spaced relation and in juxtaposition with said projection,
The inner face of each intermediate arm 11 is provided
and (c) a distal segment shorter than said intermediate
segment by at least the length of said projection, where
with a ring or eyelet 46 to receive the free end of the
by in collapsed position it may be hingedly disposed
adjacent hook 32 so that upon assembly, the latter in
lengthwise in juxtaposition between the suspension arm
angular disposition can brace the functionally positioned
leg against “outfolding” or buckling in the direction of 35 and the intermediate segment spaced thereabove, with
the free end of the distal segment disposed adjacent the
the longitudinal axis of the seat 16. On the other hand,
inner end of said projection; one leg of each adjacent
the segments are restrained from articulation in the op
crossed pair being provided with a selectively engage
posite direction by reason of their mutual end-abut
able bracket member disposable lengthwise along said
ment and the hinges mounted along their outer faces. In
addition, the inner face of the outermost (parallel) pair 40 leg with its respective ends securable to the intermediate
and distal segments thereof along the side opposite the
of legs 36, 37 is each provided with a rectangular-chan
nel bracket member 48 pivotally secured at one end to
hinge line therebetween, said bracket having a rectangu
lar channel portion adapted to frictionally overlie the
the intermediate segment b at 50 (FIGURE 5) so as to
adjacent crossed leg, whereby in supporting position the
transversely overlie the segment intersection and have its
hinged segment joints of both legs are securely held
other end detachably secured to the adjacent segment 0
(or vice versa) as by a terminal hook 52 and eye 54.
against buckling.
The adjacent, angularly disposed leg (38) is inserted in
‘2. In combination with a collapsible structure of the
the channel portion or socket of the bracket 48 before
character described, the improvement comprising: a
latching the latter, so that the joints of both (crossed)
legs are thus clamped together in position to hold them
formed with a short, upstanding, projection along its
seating material suspension arm having an outer end
50 upper face having a thickness equal to the thickness of
straight as well as in lateral registration.
Accordingly it will be apparent that I have provided
a collapsible frame, particularly adapted to support an
(attached) ?exible seat or supporting surface 16, which
frame can be quickly and easily collapsed and assembled.
a leg coupled adjacent thereto, and a supporting leg
hingedly secured adjacent the lower edge of said outer
end, said leg being formed by three successive, hingedly
connected segments of unequal length and generally equal
When set up—without the use of tools or any added at
thickness and consisting of (a) a proximate segment hav
tachments—it is sturdily self-supporting.
ing a length equal to the combined thickness of the sus
When col
lapsed and rolled into a bundle (FIGURE 10) it can be
grasped with one hand or carried in a coat pocket. In
addition to its obvious use as a seat, it can be employed
(for example) on the beach as a back rest or mounted
over a reclined person to utilize its seating surface as a
sun shade, or—with the seating vertically disposed—as
a wind break.
Other uses and advantages will become
apparent in other localities.
I claim:
1. A collapsible structure of the character described,
comprising in combination: a similar pair of generally
rectangular, inverted U-shaped frames formed of ?at
sided members of uniform thickness, of which the paral
lel side members of the U form dependent supporting
legs disposable crosswise in frictional registration with
the corresponding legs of the adjacent frame; a generally
pension arm plus said upstanding projection, whereby
said segment can be swung between a supporting posi
tion wherein one end of the dependent, upright disposed
segment abuts against the underface of the suspension
arm, and a collapsed position outswung 180° wherein
its longitudinal face is disposed against the adjacent ends
of the suspension arm and upstanding projection jointly,
(b) an intermediate segment adapted in collapsed posi
65 tion to overlie the upperface of the suspension arm in
spaced relation and in juxtaposition with said projection,
and (c) a distal segment shorter than said intermediate
segment by at least the length of said projection, whereby
in collapsed position it may be hingedly disposed length
wise in juxtaposition between the suspension arm and the
intermediate segment spaced thereabove, with the free
end of the distal segment disposed adjacent the inner end
of said projection.
rectangular surface of ?exible seating material trans
versely connecting the top cross arms of both inverted
3. The structure of the preceding claim 2 wherein said
U frames and formed with a medial inset portion along 75 suspension arm is medially hinged for folding against
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itself and each outer end thereof hingedly carries one of
said segmented legs.
4. The structure of the preceding claim 3 which com
prises two of said suspension arms each carrying a pair
of said segmented legs, the legs of one arm being dis
posable across the legs of the other arm in frictional reg
6
istration therewith, and retaining means for detachably
coupling together each such crossed pair of legs.
References Cited in the ?le of this patent
UNITED STATES PATENTS
405,117
Purdy et al. __________ __ June 11, 1889
1,047,449
1,263,509
Russ ________________ __ Dec. 17, 1912
Zendt _______________ __ April 23, 1918
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